Accessibility

New Features

• Added support for the new CSS content alternative text syntax. (272455@main) (26942023)

Resolved Issues

• Fixed role assignment for <header> inside <main> and sectioning elements. (273188@main) (48370244)
• Fixed text missing from accessibility labels for many common shadow DOM scenarios. (272531@main) (120223342)
• Fixed the mapping for the iOS accessibility framework to speak “switch button”, “on”, and “off” for <input type=checkbox switch>. (273206@main) (121215059)
• Fixed comboboxes to expose their linked objects correctly. (273542@main) (121242926)

Animations

Resolved Issues

• Fixed the transition property to produce the shortest serialization. (272513@main) (119822401)
• Fixed the animation property to produce the shortest serialization. (272629@main) (120439368)

Browser Changes

Resolved Issues

• Fixed loading a ⌘Click fragment link in a background tab. (272906@main) (119079650)
• Fixed saving linked subresources when saving web page resources. (272925@main) (120491493)

CSS

New Features

• Added supports() syntax for @import rules. (273591@main) (109060734)

Resolved Issues

• Fixed getComputedStyle() for invalid pseudo-elements. (272543@main) (98504661)
• Fixed oklab and oklch lightness value clamping. (272501@main) (116195533)
• Fixed poor performance with :has(+ :not(.class)) pseudo-class selector. (272678@main) (119819247)
• Fixed CSS content computed value serialization. (272476@main) (120061551)
• Fixed pseudo-element parsing in getComputedStyle() and KeyframeEffect.prototype.pseudoElement so they require them starting with :: (or : for 4 legacy pseudo-elements). (272499@main) (120170550)
• Fixed CSS linear() easing. (272613@main) (120290721)
• Fixed: Aliased :-webkit-full-screen pseudo-class to :fullscreen. (272577@main) (120335917)
• Fixed: Aliased :-webkit-any-link to :any-link and :matches() to :is(). (272559@main) (120337922)
• Fixed getComputedStyle() pseudo-element parsing to support the full range of CSS syntax. (272649@main) (120471227)
• Fixed :not(:has(:not(foo))) getting misclassified as scope breaking. (273177@main) (120492012)
• Fixed @supports to correctly handle support for some -webkit prefixed pseudo-elements that were incorrectly treated as unsupported. (272726@main) (120577690)
• Fixed updating media-query sensitive meta tags after style changes. (272947@main) (120854167)

Deprecations

• Removed -webkit-alt and alt properties. (272480@main) (120051066)
• Removed the non-standard resize: auto property. (273035@main) (120138995)
• Made -apple- prefixed pseudo-elements no longer valid. (272538@main) (120268884)
• Removed :-webkit-animating-full-screen-transition pseudo-class. (273529@main) (121302758)
• Removed :-khtml-drag pseudo-class. (273261@main) (121303391)

Forms

Resolved Issues

• Fixed text-indent to affect the selected file(s) label for file inputs. (272837@main) (105223868)

Loading

Resolved Issues

• Fixed navigator.cookieEnabled to return false when cookies are blocked. (273522@main) (121284878)

Lockdown Mode

Resolved Issues

• Fixed Lockdown Mode disabling on sites with COOP and COEP HTTP headers. (273243@main) (119503109)

Media

Resolved Issues

• Fixed HLS video captions where there are multiple text tracks available. (272784@main) (119839950)
• Fixed fullscreen video not scaling to display size when the Safari window is in Full Screen App Mode. (272733@main) (119893556)
• Fixed handling key renewal requests that cause playback errors for some DRM content. (272592@main) (120230860)
• Fixed paint-on captions shifting during playback. (272966@main) (120847946)
• Fixed blocked encrypted sampled not getting enqueued after a CDM is attached to a SourceBuffer. (273340@main) (120879185)

Rendering

Resolved Issues

• Fixed resizing a <textarea> element with 1rem padding. (273029@main) (90639221)
• Fixed incorrectly oriented Traditional Mongolian script characters. (272454@main) (93426525)
• Fixed handling images with color spaces not supported by the backend to fallback to render in sRGB. (273204@main) (118238178)
• Fixed check boxes and radio buttons to avoid floats. (273047@main) (118660695)
• Fixed rendering issues when editing text. (273320@main) (119833765)
• Fixed a floating element causing a list item bullet to be orphaned on constrained lines. (272451@main) (120022893)
• Fixed fully repainting form controls with visual overflow and writing-mode: vertical-rl. (272799@main) (120066970)
• Fixed incorrect inline box (hugging) outline painting in vertical writing modes. (272512@main) (120217559)
• Fixed incorrect ch unit value in vertical-rl and vertical-lr when text-orientation is not upright. (272536@main) (120293590)
• Fixed the color correctness of the color matrix filter. (272891@main) (120795573)
• Fixed overflow: hidden preventing CSS Subgrid. (273134@main) (120848131)
• Fixed the repaint area for underline text decorations. (273126@main) (121082290)
• Fixed rendering floats and an out-of-flow <br> element with clear. (273407@main) (121444267)

Scrolling

Resolved Issues

• Fixed unusable horizontal scrollbars with a right-to-left element. (272466@main) (109858866)
• Fixed wheel overflow behavior with Shadow DOM elements. (273181@main) (118496293)
• Fixed keyboard scrolling beyond the page getting stuck at a bad scroll offset. (272957@main) (120053910)
• Fixed a variety of issues by disabling Scroll Anchoring. (273238@main) (121236706)

Storage

Resolved Issues

• Fixed cases where website data is unexpectedly evicted. (272951@main) (119818267)

Deprecations

• Removed support for AppCache. (273297@main) (113343269)

SVG

Resolved Issues

• Fixed negative SVGTransform scale values to be correctly stringified. (272885@main) (118656892)
• Fixed the layout of an SVG when it is inside an <iframe> without affecting the size of the <iframe>. (272503@main) (120178866)
• Fixed displaying an SVG element inside a <switch> element. (272831@main) (120732837)

Web API

New Features

• Added support for CustomStateSet in custom elements and :state() pseudo-class. (272474@main) (120072599)

Resolved Issues

• Fixed: Added support for AES-GCM in WebCrypto. (273488@main) (101040216)
• Fixed removing highlights in the Custom Highlights API. (272723@main) (119531671)
• Fixed unnecessarily unsetting the iframe fullscreen flag. (272462@main) (120052751)
• Fixed getElementsByName() to only return HTML elements, not SVG, MathML, or other types of elements. (272530@main) (120275680)
• Fixed the button value for a pointerup event not matching the pointerdown event. (273263@main) (120429508)
• Fixed a wheel event to fire on an element that has been re-inserted after document.open. (272960@main) (120893136)
• Fixed Scroll To Text Fragment Text Directives to find text with additional unrendered white space in their node data. (273016@main) (120913588)
• Fixed Media Capture API to capture the camera. (273258@main) (121256297)

Deprecations

• Removed support for KeyboardEvent.altGraphKey. (273379@main) (102980723)
• Removed AES-CFB support from WebCrypto. (272615@main) (120000331)
• Removed the non-standard KeyboardEvent.keyLocation. (273457@main) (121564228)

Web Extensions

Resolved Issues

• Fixed browsing.scripting.executeScript to handle all valid argument types. (120727491)

WebAuthn

Resolved Issues

• Fixed getClientCapabilities to align with WebAuthn standards to use a record type with camelCase values. (272998@main) (120442670)

WebGL

New Features

• Enabled support for EXT_conservative_depth and NV_shader_noperspective_interpolation. (272979@main) (120907578)

Resolved Issues

• Fixed WebGL to be available in nested workers. (272765@main) (120279728)

WebRTC

Resolved Issues

• Fixed triggering resolution scaling in the case of WebRTC maintain-framerate degradationPreference. (273172@main) (121041723)